Deep tissue massage is a form of massage therapy that is used to access the deeper layers of muscle and connective tissue. When being used in a treatment, it is very effective in breaking down adhesions and reducing tensions in the muscles and fascia. Since the therapist will be using more pressure during this treatment than a relaxation massage, it can be more intense, and can also lead to some soreness the day after.
As with every style of massage, always maintain good verbal communication with your therapist. While deep tissue massage can be more intense and some areas may be more sensitive to pressure, it should never cause injury when performed correctly. Be sure to tell your therapist if you feel there is too much pressure, or if you are feeling brave, not enough pressure!